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时间:2021-03-03
《运用两级喷射式制冷提高客运汽车空调性能的理论与实验研究.docx》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、运用两级喷射式制冷提高客运汽车空调性能的理论与实验研究Thecurrentworldsituationofanincreasingpopulationisleadingtoanincreaseinthefuelconsumption,greenhousegasemissions,electricalpowerconsumptionetc.Theseincreasesarebecomingaseriousproblemwhichvariousorganizationsareconcernedaboutandaretryingtosolve.Anincreaseofbusaircond
2、itioningsystemsincreasesfuelconsumptionandthereforeproducesgreenhousegasemissionsasconventionalbusairconditionersarevaporcompressionsystemsdrivenbyenginepower.Inordertoreducethefuelconsumptionandgasemissionofabus,atwostageejectorcoolingsystemisselectedtostudybecausethesystemrequireslittleelect
3、ricalpowerorenginepowertodrivethesystem.Itusesexhaustgasemissionsfrombusestodrive.Thetwostageejectorcoolingsystemisusedtocoolcondensatefromthecondenserofabusairconditionertoasubcoolingstateinordertoenhancetheperformanceofvaporcompressionsystem.Theobjectiveofthisresearchistostudyintheoreticalan
4、dexperimentalperformancesofatwostageejectorcoolingsystemusingthewasteheatoftheengine(exhaustgases).Todevelopacombinedairconditioningsystemwithatwostageejectorcoolingsubsystemandavaporcompressionsubsystemandevaluatingtheapplicationsofatwostageejectorcoolingsystemtoenhancetheperformanceofthetrad
5、itionalbusairconditioning(vaporcompressionsystem).ThecoolingcapacityobtainedfromthetwostageejectorcoolingsubsystemisinturnusedtocoolthecondensateofthevaporcompressionsubsystemtoasubcooledstatetoincreasetheCOPofthevaporcompressionsubsystem.Theejectorcoolingsystemuseswaterastheworkingfluid;thede
6、signoperatingconditionshaveageneratingtemperatureof150℃,acondensingtemperatureof54℃andanevaporatingtemperatureof13℃,Inthiswork,variablesweretestedinordertounderstandtheapplicationofthesystemandtheeffectofvaryingoperatingconditions.Inaddition,thecomparisonoftheperformancebetweenthesinglestagean
7、dtwostageejectorcoolingsystemhasbeencarriedout.Theresultsindicatethatatwostageejectorcoolingsystemcandecreasethetemperatureofthecondensatefromthecondenserfrom54℃to26.5℃underoperatingconditionswithageneratingtemperatureof150℃andanevapora
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